docs(clean):revise __init_.py

[qidanrui]

Description

revise init.py to make build doc work.

Checklist:

• [ ] My code follows the style guidelines of this project
• [ ] I have already squashed the commits and make the commit message conform to the project standard.
• [ ] I have already marked the commit with "BREAKING CHANGE" or "Fixes #" if needed.
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules

[codecov[bot]]

Codecov Report

Merging #871 (0893474) into develop (8798a14) will increase coverage by 0.11%. The diff coverage is 91.48%.

@@             Coverage Diff             @@
##           develop     #871      +/-   ##
===========================================
+ Coverage    55.94%   56.06%   +0.11%     
===========================================
  Files          314      314              
  Lines        20434    20453      +19     
===========================================
+ Hits         11432    11466      +34     
+ Misses        9002     8987      -15     

Impacted Files	Coverage Δ
dataprep/eda/diff/compute/multiple_df.py	94.24% <55.55%> (+3.18%)	:arrow_up:
dataprep/__init__.py	100.00% <100.00%> (ø)
dataprep/clean/__init__.py	100.00% <100.00%> (ø)
dataprep/eda/create_report/formatter.py	94.19% <100.00%> (+0.05%)	:arrow_up:
dataprep/eda/distribution/compute/bivariate.py	86.29% <100.00%> (+1.98%)	:arrow_up:
dataprep/eda/distribution/render.py	90.96% <100.00%> (+0.22%)	:arrow_up:
dataprep/eda/utils.py	82.57% <100.00%> (+0.33%)	:arrow_up:
dataprep/tests/eda/test_create_report.py	100.00% <100.00%> (ø)
dataprep/tests/eda/test_plot.py	100.00% <100.00%> (ø)
dataprep/tests/eda/test_plot_diff.py	100.00% <100.00%> (ø)
... and 3 more

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